The only app built specifically for the GR20 — Corsica's legendary 178 km mountain trail.
PLAN YOUR GR20
Set your available days and fitness level. The algorithm distributes the trail into optimal stages between refuges and bergeries. Or build your plan manually, with rest days. No more spreadsheets.
DAILY MORNING BRIEFING
Wake up to today's stage: distance, elevation gain, weather forecast, water points and key waypoints — plus your booking reference. One screen, ready to go.
LIVE GPS NAVIGATION
Your position on the GR20 in real-time — with direction arrow, off-trail alerts (beep + vibrate when you drift >50m), and distance to the next stop. Full topo map with contour lines, no cell service needed.
OFFLINE TOPO MAPS
Download the complete GR20 map corridor before you leave. Works without any internet connection — essential in Corsica's mountains where coverage is spotty at best.
GPS TRACK EXPORT
Record your actual hiking track day by day. Export as GPX to relive your GR20 or share with friends.
ALSO IN YOUR BROWSER
The full GR20 planner is also available as a web app at gr20.randonav.app — nothing to install.
WHAT MAKES THIS DIFFERENT
• Built for one trail only — every feature is GR20-specific
• Knows all 26 possible stages including bergeries most apps miss
• Elevation profiles color-coded by gradient with technical sections highlighted
• Battery saver mode for multi-day mountain use
• Works in English and French
• No account required, no tracking, no ads
TRAIL STATS
• 178 km from Calenzana to Conca (or reverse)
• 26 possible stages with refuges and bergeries
• +11,340m total elevation gain
• Season: June – September